Research Article
Nov 1959
Hydraulic Characteristics of Hollow-Jet Valves
Authors: Dale M. Lancaster, M.ASCE, and Robert B. DexterAuthor Affiliations
Publication: Journal of the Hydraulics Division
Volume 85, Issue 11
Abstract
For free discharge conditions the hollow-jet valve has proved to be a satisfactory control device for flows through large conduits operating under high heads. Results of field tests with a 96-inch hollow-jet valve have revealed close agreement with hydraulic characteristics predicted from model studies. Piezometric measurements, thrust determinations on the valve needle, and rates of discharge were included in both field and laboratory tests. The prototype valve can be used as a metering device by the employment of model calibration results provided accurate position indicators are used. The only cavitation erosion evident in the prototype valve was caused by local irregularities in the body casting, which have been alleviated in subsequent valves by careful foundry practice and inspection.
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Published In
Journal of the Hydraulics Division
Volume 85 • Issue 11 • November 1959
Pages: 53 - 63
Copyright
© 1959 American Society of Civil Engineers.
History
Published in print: Nov 1959
Published online: Jan 13, 2021
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Affiliations
Dale M. Lancaster, M.ASCE
Engr., Dept. of Public Works, U.S. Navy, Great Lakes, Ill
Robert B. Dexter
Hydr. Engr., Div. of Eng. Labs., Bureau of Reclamation, Denver, Colo.
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.